if.c revision 1.254
1 /* $NetBSD: if.c,v 1.254 2011/10/19 21:29:51 dyoung Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000, 2001, 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by William Studenmund and Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the project nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 */ 60 61 /* 62 * Copyright (c) 1980, 1986, 1993 63 * The Regents of the University of California. All rights reserved. 64 * 65 * Redistribution and use in source and binary forms, with or without 66 * modification, are permitted provided that the following conditions 67 * are met: 68 * 1. Redistributions of source code must retain the above copyright 69 * notice, this list of conditions and the following disclaimer. 70 * 2. Redistributions in binary form must reproduce the above copyright 71 * notice, this list of conditions and the following disclaimer in the 72 * documentation and/or other materials provided with the distribution. 73 * 3. Neither the name of the University nor the names of its contributors 74 * may be used to endorse or promote products derived from this software 75 * without specific prior written permission. 76 * 77 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 78 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 79 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 80 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 81 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 82 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 83 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 84 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 85 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 86 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 87 * SUCH DAMAGE. 88 * 89 * @(#)if.c 8.5 (Berkeley) 1/9/95 90 */ 91 92 #include <sys/cdefs.h> 93 __KERNEL_RCSID(0, "$NetBSD: if.c,v 1.254 2011/10/19 21:29:51 dyoung Exp $"); 94 95 #include "opt_inet.h" 96 97 #include "opt_atalk.h" 98 #include "opt_natm.h" 99 #include "opt_pfil_hooks.h" 100 101 #include <sys/param.h> 102 #include <sys/mbuf.h> 103 #include <sys/systm.h> 104 #include <sys/callout.h> 105 #include <sys/proc.h> 106 #include <sys/socket.h> 107 #include <sys/socketvar.h> 108 #include <sys/domain.h> 109 #include <sys/protosw.h> 110 #include <sys/kernel.h> 111 #include <sys/ioctl.h> 112 #include <sys/sysctl.h> 113 #include <sys/syslog.h> 114 #include <sys/kauth.h> 115 #include <sys/kmem.h> 116 117 #include <net/if.h> 118 #include <net/if_dl.h> 119 #include <net/if_ether.h> 120 #include <net/if_media.h> 121 #include <net80211/ieee80211.h> 122 #include <net80211/ieee80211_ioctl.h> 123 #include <net/if_types.h> 124 #include <net/radix.h> 125 #include <net/route.h> 126 #include <net/netisr.h> 127 #ifdef NETATALK 128 #include <netatalk/at_extern.h> 129 #include <netatalk/at.h> 130 #endif 131 #include <net/pfil.h> 132 133 #ifdef INET6 134 #include <netinet/in.h> 135 #include <netinet6/in6_var.h> 136 #include <netinet6/nd6.h> 137 #endif 138 139 #include "carp.h" 140 #if NCARP > 0 141 #include <netinet/ip_carp.h> 142 #endif 143 144 #include <compat/sys/sockio.h> 145 #include <compat/sys/socket.h> 146 147 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 148 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 149 150 int ifqmaxlen = IFQ_MAXLEN; 151 callout_t if_slowtimo_ch; 152 153 int netisr; /* scheduling bits for network */ 154 155 static int if_rt_walktree(struct rtentry *, void *); 156 157 static struct if_clone *if_clone_lookup(const char *, int *); 158 static int if_clone_list(struct if_clonereq *); 159 160 static LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners); 161 static int if_cloners_count; 162 163 static uint64_t index_gen; 164 static kmutex_t index_gen_mtx; 165 166 #ifdef PFIL_HOOKS 167 struct pfil_head if_pfil; /* packet filtering hook for interfaces */ 168 #endif 169 170 static kauth_listener_t if_listener; 171 172 static int ifioctl_attach(struct ifnet *); 173 static void ifioctl_detach(struct ifnet *); 174 static void ifnet_lock_enter(struct ifnet_lock *); 175 static void ifnet_lock_exit(struct ifnet_lock *); 176 static void if_detach_queues(struct ifnet *, struct ifqueue *); 177 static void sysctl_sndq_setup(struct sysctllog **, const char *, 178 struct ifaltq *); 179 180 #if defined(INET) || defined(INET6) 181 static void sysctl_net_ifq_setup(struct sysctllog **, int, const char *, 182 int, const char *, int, struct ifqueue *); 183 #endif 184 185 static int 186 if_listener_cb(kauth_cred_t cred, kauth_action_t action, void *cookie, 187 void *arg0, void *arg1, void *arg2, void *arg3) 188 { 189 int result; 190 enum kauth_network_req req; 191 192 result = KAUTH_RESULT_DEFER; 193 req = (enum kauth_network_req)arg1; 194 195 if (action != KAUTH_NETWORK_INTERFACE) 196 return result; 197 198 if ((req == KAUTH_REQ_NETWORK_INTERFACE_GET) || 199 (req == KAUTH_REQ_NETWORK_INTERFACE_SET)) 200 result = KAUTH_RESULT_ALLOW; 201 202 return result; 203 } 204 205 /* 206 * Network interface utility routines. 207 * 208 * Routines with ifa_ifwith* names take sockaddr *'s as 209 * parameters. 210 */ 211 void 212 ifinit(void) 213 { 214 #ifdef INET 215 {extern struct ifqueue ipintrq; 216 sysctl_net_ifq_setup(NULL, PF_INET, "inet", IPPROTO_IP, "ip", 217 IPCTL_IFQ, &ipintrq);} 218 #endif /* INET */ 219 #ifdef INET6 220 {extern struct ifqueue ip6intrq; 221 sysctl_net_ifq_setup(NULL, PF_INET6, "inet6", IPPROTO_IPV6, "ip6", 222 IPV6CTL_IFQ, &ip6intrq);} 223 #endif /* INET6 */ 224 225 callout_init(&if_slowtimo_ch, 0); 226 if_slowtimo(NULL); 227 228 if_listener = kauth_listen_scope(KAUTH_SCOPE_NETWORK, 229 if_listener_cb, NULL); 230 } 231 232 /* 233 * XXX Initialization before configure(). 234 * XXX hack to get pfil_add_hook working in autoconf. 235 */ 236 void 237 ifinit1(void) 238 { 239 240 mutex_init(&index_gen_mtx, MUTEX_DEFAULT, IPL_NONE); 241 242 #ifdef PFIL_HOOKS 243 if_pfil.ph_type = PFIL_TYPE_IFNET; 244 if_pfil.ph_ifnet = NULL; 245 if (pfil_head_register(&if_pfil) != 0) 246 printf("WARNING: unable to register pfil hook\n"); 247 #endif 248 } 249 250 struct ifnet * 251 if_alloc(u_char type) 252 { 253 return malloc(sizeof(struct ifnet), M_DEVBUF, M_WAITOK|M_ZERO); 254 } 255 256 void 257 if_free(struct ifnet *ifp) 258 { 259 free(ifp, M_DEVBUF); 260 } 261 262 void 263 if_initname(struct ifnet *ifp, const char *name, int unit) 264 { 265 (void)snprintf(ifp->if_xname, sizeof(ifp->if_xname), 266 "%s%d", name, unit); 267 } 268 269 /* 270 * Null routines used while an interface is going away. These routines 271 * just return an error. 272 */ 273 274 int 275 if_nulloutput(struct ifnet *ifp, struct mbuf *m, 276 const struct sockaddr *so, struct rtentry *rt) 277 { 278 279 return ENXIO; 280 } 281 282 void 283 if_nullinput(struct ifnet *ifp, struct mbuf *m) 284 { 285 286 /* Nothing. */ 287 } 288 289 void 290 if_nullstart(struct ifnet *ifp) 291 { 292 293 /* Nothing. */ 294 } 295 296 int 297 if_nullioctl(struct ifnet *ifp, u_long cmd, void *data) 298 { 299 300 cv_signal(&ifp->if_ioctl_lock->il_emptied); 301 return ENXIO; 302 } 303 304 int 305 if_nullinit(struct ifnet *ifp) 306 { 307 308 return ENXIO; 309 } 310 311 void 312 if_nullstop(struct ifnet *ifp, int disable) 313 { 314 315 /* Nothing. */ 316 } 317 318 void 319 if_nullwatchdog(struct ifnet *ifp) 320 { 321 322 /* Nothing. */ 323 } 324 325 void 326 if_nulldrain(struct ifnet *ifp) 327 { 328 329 /* Nothing. */ 330 } 331 332 static u_int if_index = 1; 333 struct ifnet_head ifnet; 334 size_t if_indexlim = 0; 335 struct ifaddr **ifnet_addrs = NULL; 336 struct ifnet **ifindex2ifnet = NULL; 337 struct ifnet *lo0ifp; 338 339 void 340 if_set_sadl(struct ifnet *ifp, const void *lla, u_char addrlen, bool factory) 341 { 342 struct ifaddr *ifa; 343 struct sockaddr_dl *sdl; 344 345 ifp->if_addrlen = addrlen; 346 if_alloc_sadl(ifp); 347 ifa = ifp->if_dl; 348 sdl = satosdl(ifa->ifa_addr); 349 350 (void)sockaddr_dl_setaddr(sdl, sdl->sdl_len, lla, ifp->if_addrlen); 351 if (factory) { 352 ifp->if_hwdl = ifp->if_dl; 353 IFAREF(ifp->if_hwdl); 354 } 355 /* TBD routing socket */ 356 } 357 358 struct ifaddr * 359 if_dl_create(const struct ifnet *ifp, const struct sockaddr_dl **sdlp) 360 { 361 unsigned socksize, ifasize; 362 int addrlen, namelen; 363 struct sockaddr_dl *mask, *sdl; 364 struct ifaddr *ifa; 365 366 namelen = strlen(ifp->if_xname); 367 addrlen = ifp->if_addrlen; 368 socksize = roundup(sockaddr_dl_measure(namelen, addrlen), sizeof(long)); 369 ifasize = sizeof(*ifa) + 2 * socksize; 370 ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK|M_ZERO); 371 372 sdl = (struct sockaddr_dl *)(ifa + 1); 373 mask = (struct sockaddr_dl *)(socksize + (char *)sdl); 374 375 sockaddr_dl_init(sdl, socksize, ifp->if_index, ifp->if_type, 376 ifp->if_xname, namelen, NULL, addrlen); 377 mask->sdl_len = sockaddr_dl_measure(namelen, 0); 378 memset(&mask->sdl_data[0], 0xff, namelen); 379 ifa->ifa_rtrequest = link_rtrequest; 380 ifa->ifa_addr = (struct sockaddr *)sdl; 381 ifa->ifa_netmask = (struct sockaddr *)mask; 382 383 *sdlp = sdl; 384 385 return ifa; 386 } 387 388 static void 389 if_sadl_setrefs(struct ifnet *ifp, struct ifaddr *ifa) 390 { 391 const struct sockaddr_dl *sdl; 392 ifnet_addrs[ifp->if_index] = ifa; 393 IFAREF(ifa); 394 ifp->if_dl = ifa; 395 IFAREF(ifa); 396 sdl = satosdl(ifa->ifa_addr); 397 ifp->if_sadl = sdl; 398 } 399 400 /* 401 * Allocate the link level name for the specified interface. This 402 * is an attachment helper. It must be called after ifp->if_addrlen 403 * is initialized, which may not be the case when if_attach() is 404 * called. 405 */ 406 void 407 if_alloc_sadl(struct ifnet *ifp) 408 { 409 struct ifaddr *ifa; 410 const struct sockaddr_dl *sdl; 411 412 /* 413 * If the interface already has a link name, release it 414 * now. This is useful for interfaces that can change 415 * link types, and thus switch link names often. 416 */ 417 if (ifp->if_sadl != NULL) 418 if_free_sadl(ifp); 419 420 ifa = if_dl_create(ifp, &sdl); 421 422 ifa_insert(ifp, ifa); 423 if_sadl_setrefs(ifp, ifa); 424 } 425 426 static void 427 if_deactivate_sadl(struct ifnet *ifp) 428 { 429 struct ifaddr *ifa; 430 431 KASSERT(ifp->if_dl != NULL); 432 433 ifa = ifp->if_dl; 434 435 ifp->if_sadl = NULL; 436 437 ifnet_addrs[ifp->if_index] = NULL; 438 IFAFREE(ifa); 439 ifp->if_dl = NULL; 440 IFAFREE(ifa); 441 } 442 443 void 444 if_activate_sadl(struct ifnet *ifp, struct ifaddr *ifa, 445 const struct sockaddr_dl *sdl) 446 { 447 int s; 448 449 s = splnet(); 450 451 if_deactivate_sadl(ifp); 452 453 if_sadl_setrefs(ifp, ifa); 454 IFADDR_FOREACH(ifa, ifp) 455 rtinit(ifa, RTM_LLINFO_UPD, 0); 456 splx(s); 457 } 458 459 /* 460 * Free the link level name for the specified interface. This is 461 * a detach helper. This is called from if_detach() or from 462 * link layer type specific detach functions. 463 */ 464 void 465 if_free_sadl(struct ifnet *ifp) 466 { 467 struct ifaddr *ifa; 468 int s; 469 470 ifa = ifnet_addrs[ifp->if_index]; 471 if (ifa == NULL) { 472 KASSERT(ifp->if_sadl == NULL); 473 KASSERT(ifp->if_dl == NULL); 474 return; 475 } 476 477 KASSERT(ifp->if_sadl != NULL); 478 KASSERT(ifp->if_dl != NULL); 479 480 s = splnet(); 481 rtinit(ifa, RTM_DELETE, 0); 482 ifa_remove(ifp, ifa); 483 if_deactivate_sadl(ifp); 484 if (ifp->if_hwdl == ifa) { 485 IFAFREE(ifa); 486 ifp->if_hwdl = NULL; 487 } 488 splx(s); 489 } 490 491 /* 492 * Attach an interface to the 493 * list of "active" interfaces. 494 */ 495 void 496 if_attach(struct ifnet *ifp) 497 { 498 int indexlim = 0; 499 500 if (if_indexlim == 0) { 501 TAILQ_INIT(&ifnet); 502 if_indexlim = 8; 503 } 504 TAILQ_INIT(&ifp->if_addrlist); 505 TAILQ_INSERT_TAIL(&ifnet, ifp, if_list); 506 507 ifioctl_attach(ifp); /* XXX ifioctl_attach can fail! */ 508 509 mutex_enter(&index_gen_mtx); 510 ifp->if_index_gen = index_gen++; 511 mutex_exit(&index_gen_mtx); 512 513 ifp->if_index = if_index; 514 if (ifindex2ifnet == NULL) 515 if_index++; 516 else 517 while (ifp->if_index < if_indexlim && 518 ifindex2ifnet[ifp->if_index] != NULL) { 519 ++if_index; 520 if (if_index == 0) 521 if_index = 1; 522 /* 523 * If we hit USHRT_MAX, we skip back to 0 since 524 * there are a number of places where the value 525 * of if_index or if_index itself is compared 526 * to or stored in an unsigned short. By 527 * jumping back, we won't botch those assignments 528 * or comparisons. 529 */ 530 else if (if_index == USHRT_MAX) { 531 /* 532 * However, if we have to jump back to 533 * zero *twice* without finding an empty 534 * slot in ifindex2ifnet[], then there 535 * there are too many (>65535) interfaces. 536 */ 537 if (indexlim++) 538 panic("too many interfaces"); 539 else 540 if_index = 1; 541 } 542 ifp->if_index = if_index; 543 } 544 545 /* 546 * We have some arrays that should be indexed by if_index. 547 * since if_index will grow dynamically, they should grow too. 548 * struct ifadd **ifnet_addrs 549 * struct ifnet **ifindex2ifnet 550 */ 551 if (ifnet_addrs == NULL || ifindex2ifnet == NULL || 552 ifp->if_index >= if_indexlim) { 553 size_t m, n, oldlim; 554 void *q; 555 556 oldlim = if_indexlim; 557 while (ifp->if_index >= if_indexlim) 558 if_indexlim <<= 1; 559 560 /* grow ifnet_addrs */ 561 m = oldlim * sizeof(struct ifaddr *); 562 n = if_indexlim * sizeof(struct ifaddr *); 563 q = malloc(n, M_IFADDR, M_WAITOK|M_ZERO); 564 if (ifnet_addrs != NULL) { 565 memcpy(q, ifnet_addrs, m); 566 free(ifnet_addrs, M_IFADDR); 567 } 568 ifnet_addrs = (struct ifaddr **)q; 569 570 /* grow ifindex2ifnet */ 571 m = oldlim * sizeof(struct ifnet *); 572 n = if_indexlim * sizeof(struct ifnet *); 573 q = malloc(n, M_IFADDR, M_WAITOK|M_ZERO); 574 if (ifindex2ifnet != NULL) { 575 memcpy(q, ifindex2ifnet, m); 576 free(ifindex2ifnet, M_IFADDR); 577 } 578 ifindex2ifnet = (struct ifnet **)q; 579 } 580 581 ifindex2ifnet[ifp->if_index] = ifp; 582 583 /* 584 * Link level name is allocated later by a separate call to 585 * if_alloc_sadl(). 586 */ 587 588 if (ifp->if_snd.ifq_maxlen == 0) 589 ifp->if_snd.ifq_maxlen = ifqmaxlen; 590 591 sysctl_sndq_setup(&ifp->if_sysctl_log, ifp->if_xname, &ifp->if_snd); 592 593 ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */ 594 595 ifp->if_link_state = LINK_STATE_UNKNOWN; 596 597 ifp->if_capenable = 0; 598 ifp->if_csum_flags_tx = 0; 599 ifp->if_csum_flags_rx = 0; 600 601 #ifdef ALTQ 602 ifp->if_snd.altq_type = 0; 603 ifp->if_snd.altq_disc = NULL; 604 ifp->if_snd.altq_flags &= ALTQF_CANTCHANGE; 605 ifp->if_snd.altq_tbr = NULL; 606 ifp->if_snd.altq_ifp = ifp; 607 #endif 608 609 #ifdef PFIL_HOOKS 610 ifp->if_pfil.ph_type = PFIL_TYPE_IFNET; 611 ifp->if_pfil.ph_ifnet = ifp; 612 if (pfil_head_register(&ifp->if_pfil) != 0) 613 printf("%s: WARNING: unable to register pfil hook\n", 614 ifp->if_xname); 615 (void)pfil_run_hooks(&if_pfil, 616 (struct mbuf **)PFIL_IFNET_ATTACH, ifp, PFIL_IFNET); 617 #endif 618 619 if (!STAILQ_EMPTY(&domains)) 620 if_attachdomain1(ifp); 621 622 /* Announce the interface. */ 623 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 624 } 625 626 void 627 if_attachdomain(void) 628 { 629 struct ifnet *ifp; 630 int s; 631 632 s = splnet(); 633 IFNET_FOREACH(ifp) 634 if_attachdomain1(ifp); 635 splx(s); 636 } 637 638 void 639 if_attachdomain1(struct ifnet *ifp) 640 { 641 struct domain *dp; 642 int s; 643 644 s = splnet(); 645 646 /* address family dependent data region */ 647 memset(ifp->if_afdata, 0, sizeof(ifp->if_afdata)); 648 DOMAIN_FOREACH(dp) { 649 if (dp->dom_ifattach != NULL) 650 ifp->if_afdata[dp->dom_family] = 651 (*dp->dom_ifattach)(ifp); 652 } 653 654 splx(s); 655 } 656 657 /* 658 * Deactivate an interface. This points all of the procedure 659 * handles at error stubs. May be called from interrupt context. 660 */ 661 void 662 if_deactivate(struct ifnet *ifp) 663 { 664 int s; 665 666 s = splnet(); 667 668 ifp->if_output = if_nulloutput; 669 ifp->if_input = if_nullinput; 670 ifp->if_start = if_nullstart; 671 ifp->if_ioctl = if_nullioctl; 672 ifp->if_init = if_nullinit; 673 ifp->if_stop = if_nullstop; 674 ifp->if_watchdog = if_nullwatchdog; 675 ifp->if_drain = if_nulldrain; 676 677 /* No more packets may be enqueued. */ 678 ifp->if_snd.ifq_maxlen = 0; 679 680 splx(s); 681 } 682 683 void 684 if_purgeaddrs(struct ifnet *ifp, int family, void (*purgeaddr)(struct ifaddr *)) 685 { 686 struct ifaddr *ifa, *nifa; 687 688 for (ifa = IFADDR_FIRST(ifp); ifa != NULL; ifa = nifa) { 689 nifa = IFADDR_NEXT(ifa); 690 if (ifa->ifa_addr->sa_family != family) 691 continue; 692 (*purgeaddr)(ifa); 693 } 694 } 695 696 /* 697 * Detach an interface from the list of "active" interfaces, 698 * freeing any resources as we go along. 699 * 700 * NOTE: This routine must be called with a valid thread context, 701 * as it may block. 702 */ 703 void 704 if_detach(struct ifnet *ifp) 705 { 706 struct socket so; 707 struct ifaddr *ifa; 708 #ifdef IFAREF_DEBUG 709 struct ifaddr *last_ifa = NULL; 710 #endif 711 struct domain *dp; 712 const struct protosw *pr; 713 int s, i, family, purged; 714 715 /* 716 * XXX It's kind of lame that we have to have the 717 * XXX socket structure... 718 */ 719 memset(&so, 0, sizeof(so)); 720 721 s = splnet(); 722 723 /* 724 * Do an if_down() to give protocols a chance to do something. 725 */ 726 if_down(ifp); 727 728 #ifdef ALTQ 729 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 730 altq_disable(&ifp->if_snd); 731 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 732 altq_detach(&ifp->if_snd); 733 #endif 734 735 sysctl_teardown(&ifp->if_sysctl_log); 736 737 #if NCARP > 0 738 /* Remove the interface from any carp group it is a part of. */ 739 if (ifp->if_carp != NULL && ifp->if_type != IFT_CARP) 740 carp_ifdetach(ifp); 741 #endif 742 743 /* 744 * Rip all the addresses off the interface. This should make 745 * all of the routes go away. 746 * 747 * pr_usrreq calls can remove an arbitrary number of ifaddrs 748 * from the list, including our "cursor", ifa. For safety, 749 * and to honor the TAILQ abstraction, I just restart the 750 * loop after each removal. Note that the loop will exit 751 * when all of the remaining ifaddrs belong to the AF_LINK 752 * family. I am counting on the historical fact that at 753 * least one pr_usrreq in each address domain removes at 754 * least one ifaddr. 755 */ 756 again: 757 IFADDR_FOREACH(ifa, ifp) { 758 family = ifa->ifa_addr->sa_family; 759 #ifdef IFAREF_DEBUG 760 printf("if_detach: ifaddr %p, family %d, refcnt %d\n", 761 ifa, family, ifa->ifa_refcnt); 762 if (last_ifa != NULL && ifa == last_ifa) 763 panic("if_detach: loop detected"); 764 last_ifa = ifa; 765 #endif 766 if (family == AF_LINK) 767 continue; 768 dp = pffinddomain(family); 769 #ifdef DIAGNOSTIC 770 if (dp == NULL) 771 panic("if_detach: no domain for AF %d", 772 family); 773 #endif 774 /* 775 * XXX These PURGEIF calls are redundant with the 776 * purge-all-families calls below, but are left in for 777 * now both to make a smaller change, and to avoid 778 * unplanned interactions with clearing of 779 * ifp->if_addrlist. 780 */ 781 purged = 0; 782 for (pr = dp->dom_protosw; 783 pr < dp->dom_protoswNPROTOSW; pr++) { 784 so.so_proto = pr; 785 if (pr->pr_usrreq != NULL) { 786 (void) (*pr->pr_usrreq)(&so, 787 PRU_PURGEIF, NULL, NULL, 788 (struct mbuf *) ifp, curlwp); 789 purged = 1; 790 } 791 } 792 if (purged == 0) { 793 /* 794 * XXX What's really the best thing to do 795 * XXX here? --thorpej (at) NetBSD.org 796 */ 797 printf("if_detach: WARNING: AF %d not purged\n", 798 family); 799 ifa_remove(ifp, ifa); 800 } 801 goto again; 802 } 803 804 if_free_sadl(ifp); 805 806 /* Walk the routing table looking for stragglers. */ 807 for (i = 0; i <= AF_MAX; i++) { 808 while (rt_walktree(i, if_rt_walktree, ifp) == ERESTART) 809 ; 810 } 811 812 DOMAIN_FOREACH(dp) { 813 if (dp->dom_ifdetach != NULL && ifp->if_afdata[dp->dom_family]) 814 (*dp->dom_ifdetach)(ifp, 815 ifp->if_afdata[dp->dom_family]); 816 817 /* 818 * One would expect multicast memberships (INET and 819 * INET6) on UDP sockets to be purged by the PURGEIF 820 * calls above, but if all addresses were removed from 821 * the interface prior to destruction, the calls will 822 * not be made (e.g. ppp, for which pppd(8) generally 823 * removes addresses before destroying the interface). 824 * Because there is no invariant that multicast 825 * memberships only exist for interfaces with IPv4 826 * addresses, we must call PURGEIF regardless of 827 * addresses. (Protocols which might store ifnet 828 * pointers are marked with PR_PURGEIF.) 829 */ 830 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 831 so.so_proto = pr; 832 if (pr->pr_usrreq != NULL && pr->pr_flags & PR_PURGEIF) 833 (void)(*pr->pr_usrreq)(&so, PRU_PURGEIF, NULL, 834 NULL, (struct mbuf *)ifp, curlwp); 835 } 836 } 837 838 #ifdef PFIL_HOOKS 839 (void)pfil_run_hooks(&if_pfil, 840 (struct mbuf **)PFIL_IFNET_DETACH, ifp, PFIL_IFNET); 841 (void)pfil_head_unregister(&ifp->if_pfil); 842 #endif 843 844 /* Announce that the interface is gone. */ 845 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 846 847 ifindex2ifnet[ifp->if_index] = NULL; 848 849 TAILQ_REMOVE(&ifnet, ifp, if_list); 850 851 ifioctl_detach(ifp); 852 853 /* 854 * remove packets that came from ifp, from software interrupt queues. 855 */ 856 DOMAIN_FOREACH(dp) { 857 for (i = 0; i < __arraycount(dp->dom_ifqueues); i++) { 858 if (dp->dom_ifqueues[i] == NULL) 859 break; 860 if_detach_queues(ifp, dp->dom_ifqueues[i]); 861 } 862 } 863 864 splx(s); 865 } 866 867 static void 868 if_detach_queues(struct ifnet *ifp, struct ifqueue *q) 869 { 870 struct mbuf *m, *prev, *next; 871 872 prev = NULL; 873 for (m = q->ifq_head; m != NULL; m = next) { 874 next = m->m_nextpkt; 875 #ifdef DIAGNOSTIC 876 if ((m->m_flags & M_PKTHDR) == 0) { 877 prev = m; 878 continue; 879 } 880 #endif 881 if (m->m_pkthdr.rcvif != ifp) { 882 prev = m; 883 continue; 884 } 885 886 if (prev != NULL) 887 prev->m_nextpkt = m->m_nextpkt; 888 else 889 q->ifq_head = m->m_nextpkt; 890 if (q->ifq_tail == m) 891 q->ifq_tail = prev; 892 q->ifq_len--; 893 894 m->m_nextpkt = NULL; 895 m_freem(m); 896 IF_DROP(q); 897 } 898 } 899 900 /* 901 * Callback for a radix tree walk to delete all references to an 902 * ifnet. 903 */ 904 static int 905 if_rt_walktree(struct rtentry *rt, void *v) 906 { 907 struct ifnet *ifp = (struct ifnet *)v; 908 int error; 909 910 if (rt->rt_ifp != ifp) 911 return 0; 912 913 /* Delete the entry. */ 914 ++rt->rt_refcnt; 915 error = rtrequest(RTM_DELETE, rt_getkey(rt), rt->rt_gateway, 916 rt_mask(rt), rt->rt_flags, NULL); 917 KASSERT((rt->rt_flags & RTF_UP) == 0); 918 rt->rt_ifp = NULL; 919 RTFREE(rt); 920 if (error != 0) 921 printf("%s: warning: unable to delete rtentry @ %p, " 922 "error = %d\n", ifp->if_xname, rt, error); 923 return ERESTART; 924 } 925 926 /* 927 * Create a clone network interface. 928 */ 929 int 930 if_clone_create(const char *name) 931 { 932 struct if_clone *ifc; 933 int unit; 934 935 ifc = if_clone_lookup(name, &unit); 936 if (ifc == NULL) 937 return EINVAL; 938 939 if (ifunit(name) != NULL) 940 return EEXIST; 941 942 return (*ifc->ifc_create)(ifc, unit); 943 } 944 945 /* 946 * Destroy a clone network interface. 947 */ 948 int 949 if_clone_destroy(const char *name) 950 { 951 struct if_clone *ifc; 952 struct ifnet *ifp; 953 954 ifc = if_clone_lookup(name, NULL); 955 if (ifc == NULL) 956 return EINVAL; 957 958 ifp = ifunit(name); 959 if (ifp == NULL) 960 return ENXIO; 961 962 if (ifc->ifc_destroy == NULL) 963 return EOPNOTSUPP; 964 965 return (*ifc->ifc_destroy)(ifp); 966 } 967 968 /* 969 * Look up a network interface cloner. 970 */ 971 static struct if_clone * 972 if_clone_lookup(const char *name, int *unitp) 973 { 974 struct if_clone *ifc; 975 const char *cp; 976 int unit; 977 978 /* separate interface name from unit */ 979 for (cp = name; 980 cp - name < IFNAMSIZ && *cp && (*cp < '0' || *cp > '9'); 981 cp++) 982 continue; 983 984 if (cp == name || cp - name == IFNAMSIZ || !*cp) 985 return NULL; /* No name or unit number */ 986 987 LIST_FOREACH(ifc, &if_cloners, ifc_list) { 988 if (strlen(ifc->ifc_name) == cp - name && 989 strncmp(name, ifc->ifc_name, cp - name) == 0) 990 break; 991 } 992 993 if (ifc == NULL) 994 return NULL; 995 996 unit = 0; 997 while (cp - name < IFNAMSIZ && *cp) { 998 if (*cp < '0' || *cp > '9' || unit >= INT_MAX / 10) { 999 /* Bogus unit number. */ 1000 return NULL; 1001 } 1002 unit = (unit * 10) + (*cp++ - '0'); 1003 } 1004 1005 if (unitp != NULL) 1006 *unitp = unit; 1007 return ifc; 1008 } 1009 1010 /* 1011 * Register a network interface cloner. 1012 */ 1013 void 1014 if_clone_attach(struct if_clone *ifc) 1015 { 1016 1017 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list); 1018 if_cloners_count++; 1019 } 1020 1021 /* 1022 * Unregister a network interface cloner. 1023 */ 1024 void 1025 if_clone_detach(struct if_clone *ifc) 1026 { 1027 1028 LIST_REMOVE(ifc, ifc_list); 1029 if_cloners_count--; 1030 } 1031 1032 /* 1033 * Provide list of interface cloners to userspace. 1034 */ 1035 static int 1036 if_clone_list(struct if_clonereq *ifcr) 1037 { 1038 char outbuf[IFNAMSIZ], *dst; 1039 struct if_clone *ifc; 1040 int count, error = 0; 1041 1042 ifcr->ifcr_total = if_cloners_count; 1043 if ((dst = ifcr->ifcr_buffer) == NULL) { 1044 /* Just asking how many there are. */ 1045 return 0; 1046 } 1047 1048 if (ifcr->ifcr_count < 0) 1049 return EINVAL; 1050 1051 count = (if_cloners_count < ifcr->ifcr_count) ? 1052 if_cloners_count : ifcr->ifcr_count; 1053 1054 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0; 1055 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) { 1056 (void)strncpy(outbuf, ifc->ifc_name, sizeof(outbuf)); 1057 if (outbuf[sizeof(outbuf) - 1] != '\0') 1058 return ENAMETOOLONG; 1059 error = copyout(outbuf, dst, sizeof(outbuf)); 1060 if (error != 0) 1061 break; 1062 } 1063 1064 return error; 1065 } 1066 1067 void 1068 ifa_insert(struct ifnet *ifp, struct ifaddr *ifa) 1069 { 1070 ifa->ifa_ifp = ifp; 1071 TAILQ_INSERT_TAIL(&ifp->if_addrlist, ifa, ifa_list); 1072 IFAREF(ifa); 1073 } 1074 1075 void 1076 ifa_remove(struct ifnet *ifp, struct ifaddr *ifa) 1077 { 1078 KASSERT(ifa->ifa_ifp == ifp); 1079 TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list); 1080 IFAFREE(ifa); 1081 } 1082 1083 static inline int 1084 equal(const struct sockaddr *sa1, const struct sockaddr *sa2) 1085 { 1086 return sockaddr_cmp(sa1, sa2) == 0; 1087 } 1088 1089 /* 1090 * Locate an interface based on a complete address. 1091 */ 1092 /*ARGSUSED*/ 1093 struct ifaddr * 1094 ifa_ifwithaddr(const struct sockaddr *addr) 1095 { 1096 struct ifnet *ifp; 1097 struct ifaddr *ifa; 1098 1099 IFNET_FOREACH(ifp) { 1100 if (ifp->if_output == if_nulloutput) 1101 continue; 1102 IFADDR_FOREACH(ifa, ifp) { 1103 if (ifa->ifa_addr->sa_family != addr->sa_family) 1104 continue; 1105 if (equal(addr, ifa->ifa_addr)) 1106 return ifa; 1107 if ((ifp->if_flags & IFF_BROADCAST) && 1108 ifa->ifa_broadaddr && 1109 /* IP6 doesn't have broadcast */ 1110 ifa->ifa_broadaddr->sa_len != 0 && 1111 equal(ifa->ifa_broadaddr, addr)) 1112 return ifa; 1113 } 1114 } 1115 return NULL; 1116 } 1117 1118 /* 1119 * Locate the point to point interface with a given destination address. 1120 */ 1121 /*ARGSUSED*/ 1122 struct ifaddr * 1123 ifa_ifwithdstaddr(const struct sockaddr *addr) 1124 { 1125 struct ifnet *ifp; 1126 struct ifaddr *ifa; 1127 1128 IFNET_FOREACH(ifp) { 1129 if (ifp->if_output == if_nulloutput) 1130 continue; 1131 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1132 continue; 1133 IFADDR_FOREACH(ifa, ifp) { 1134 if (ifa->ifa_addr->sa_family != addr->sa_family || 1135 ifa->ifa_dstaddr == NULL) 1136 continue; 1137 if (equal(addr, ifa->ifa_dstaddr)) 1138 return ifa; 1139 } 1140 } 1141 return NULL; 1142 } 1143 1144 /* 1145 * Find an interface on a specific network. If many, choice 1146 * is most specific found. 1147 */ 1148 struct ifaddr * 1149 ifa_ifwithnet(const struct sockaddr *addr) 1150 { 1151 struct ifnet *ifp; 1152 struct ifaddr *ifa; 1153 const struct sockaddr_dl *sdl; 1154 struct ifaddr *ifa_maybe = 0; 1155 u_int af = addr->sa_family; 1156 const char *addr_data = addr->sa_data, *cplim; 1157 1158 if (af == AF_LINK) { 1159 sdl = satocsdl(addr); 1160 if (sdl->sdl_index && sdl->sdl_index < if_indexlim && 1161 ifindex2ifnet[sdl->sdl_index] && 1162 ifindex2ifnet[sdl->sdl_index]->if_output != if_nulloutput) 1163 return ifnet_addrs[sdl->sdl_index]; 1164 } 1165 #ifdef NETATALK 1166 if (af == AF_APPLETALK) { 1167 const struct sockaddr_at *sat, *sat2; 1168 sat = (const struct sockaddr_at *)addr; 1169 IFNET_FOREACH(ifp) { 1170 if (ifp->if_output == if_nulloutput) 1171 continue; 1172 ifa = at_ifawithnet((const struct sockaddr_at *)addr, ifp); 1173 if (ifa == NULL) 1174 continue; 1175 sat2 = (struct sockaddr_at *)ifa->ifa_addr; 1176 if (sat2->sat_addr.s_net == sat->sat_addr.s_net) 1177 return ifa; /* exact match */ 1178 if (ifa_maybe == NULL) { 1179 /* else keep the if with the right range */ 1180 ifa_maybe = ifa; 1181 } 1182 } 1183 return ifa_maybe; 1184 } 1185 #endif 1186 IFNET_FOREACH(ifp) { 1187 if (ifp->if_output == if_nulloutput) 1188 continue; 1189 IFADDR_FOREACH(ifa, ifp) { 1190 const char *cp, *cp2, *cp3; 1191 1192 if (ifa->ifa_addr->sa_family != af || 1193 ifa->ifa_netmask == NULL) 1194 next: continue; 1195 cp = addr_data; 1196 cp2 = ifa->ifa_addr->sa_data; 1197 cp3 = ifa->ifa_netmask->sa_data; 1198 cplim = (const char *)ifa->ifa_netmask + 1199 ifa->ifa_netmask->sa_len; 1200 while (cp3 < cplim) { 1201 if ((*cp++ ^ *cp2++) & *cp3++) { 1202 /* want to continue for() loop */ 1203 goto next; 1204 } 1205 } 1206 if (ifa_maybe == NULL || 1207 rn_refines((void *)ifa->ifa_netmask, 1208 (void *)ifa_maybe->ifa_netmask)) 1209 ifa_maybe = ifa; 1210 } 1211 } 1212 return ifa_maybe; 1213 } 1214 1215 /* 1216 * Find the interface of the addresss. 1217 */ 1218 struct ifaddr * 1219 ifa_ifwithladdr(const struct sockaddr *addr) 1220 { 1221 struct ifaddr *ia; 1222 1223 if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr)) || 1224 (ia = ifa_ifwithnet(addr))) 1225 return ia; 1226 return NULL; 1227 } 1228 1229 /* 1230 * Find an interface using a specific address family 1231 */ 1232 struct ifaddr * 1233 ifa_ifwithaf(int af) 1234 { 1235 struct ifnet *ifp; 1236 struct ifaddr *ifa; 1237 1238 IFNET_FOREACH(ifp) { 1239 if (ifp->if_output == if_nulloutput) 1240 continue; 1241 IFADDR_FOREACH(ifa, ifp) { 1242 if (ifa->ifa_addr->sa_family == af) 1243 return ifa; 1244 } 1245 } 1246 return NULL; 1247 } 1248 1249 /* 1250 * Find an interface address specific to an interface best matching 1251 * a given address. 1252 */ 1253 struct ifaddr * 1254 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp) 1255 { 1256 struct ifaddr *ifa; 1257 const char *cp, *cp2, *cp3; 1258 const char *cplim; 1259 struct ifaddr *ifa_maybe = 0; 1260 u_int af = addr->sa_family; 1261 1262 if (ifp->if_output == if_nulloutput) 1263 return NULL; 1264 1265 if (af >= AF_MAX) 1266 return NULL; 1267 1268 IFADDR_FOREACH(ifa, ifp) { 1269 if (ifa->ifa_addr->sa_family != af) 1270 continue; 1271 ifa_maybe = ifa; 1272 if (ifa->ifa_netmask == NULL) { 1273 if (equal(addr, ifa->ifa_addr) || 1274 (ifa->ifa_dstaddr && 1275 equal(addr, ifa->ifa_dstaddr))) 1276 return ifa; 1277 continue; 1278 } 1279 cp = addr->sa_data; 1280 cp2 = ifa->ifa_addr->sa_data; 1281 cp3 = ifa->ifa_netmask->sa_data; 1282 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1283 for (; cp3 < cplim; cp3++) { 1284 if ((*cp++ ^ *cp2++) & *cp3) 1285 break; 1286 } 1287 if (cp3 == cplim) 1288 return ifa; 1289 } 1290 return ifa_maybe; 1291 } 1292 1293 /* 1294 * Default action when installing a route with a Link Level gateway. 1295 * Lookup an appropriate real ifa to point to. 1296 * This should be moved to /sys/net/link.c eventually. 1297 */ 1298 void 1299 link_rtrequest(int cmd, struct rtentry *rt, const struct rt_addrinfo *info) 1300 { 1301 struct ifaddr *ifa; 1302 const struct sockaddr *dst; 1303 struct ifnet *ifp; 1304 1305 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL || 1306 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_getkey(rt)) == NULL) 1307 return; 1308 if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) { 1309 rt_replace_ifa(rt, ifa); 1310 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1311 ifa->ifa_rtrequest(cmd, rt, info); 1312 } 1313 } 1314 1315 /* 1316 * Handle a change in the interface link state. 1317 */ 1318 void 1319 if_link_state_change(struct ifnet *ifp, int link_state) 1320 { 1321 if (ifp->if_link_state == link_state) 1322 return; 1323 ifp->if_link_state = link_state; 1324 /* Notify that the link state has changed. */ 1325 rt_ifmsg(ifp); 1326 #if NCARP > 0 1327 if (ifp->if_carp) 1328 carp_carpdev_state(ifp); 1329 #endif 1330 } 1331 1332 /* 1333 * Mark an interface down and notify protocols of 1334 * the transition. 1335 * NOTE: must be called at splsoftnet or equivalent. 1336 */ 1337 void 1338 if_down(struct ifnet *ifp) 1339 { 1340 struct ifaddr *ifa; 1341 1342 ifp->if_flags &= ~IFF_UP; 1343 nanotime(&ifp->if_lastchange); 1344 IFADDR_FOREACH(ifa, ifp) 1345 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1346 IFQ_PURGE(&ifp->if_snd); 1347 #if NCARP > 0 1348 if (ifp->if_carp) 1349 carp_carpdev_state(ifp); 1350 #endif 1351 rt_ifmsg(ifp); 1352 } 1353 1354 /* 1355 * Mark an interface up and notify protocols of 1356 * the transition. 1357 * NOTE: must be called at splsoftnet or equivalent. 1358 */ 1359 void 1360 if_up(struct ifnet *ifp) 1361 { 1362 #ifdef notyet 1363 struct ifaddr *ifa; 1364 #endif 1365 1366 ifp->if_flags |= IFF_UP; 1367 nanotime(&ifp->if_lastchange); 1368 #ifdef notyet 1369 /* this has no effect on IP, and will kill all ISO connections XXX */ 1370 IFADDR_FOREACH(ifa, ifp) 1371 pfctlinput(PRC_IFUP, ifa->ifa_addr); 1372 #endif 1373 #if NCARP > 0 1374 if (ifp->if_carp) 1375 carp_carpdev_state(ifp); 1376 #endif 1377 rt_ifmsg(ifp); 1378 #ifdef INET6 1379 in6_if_up(ifp); 1380 #endif 1381 } 1382 1383 /* 1384 * Handle interface watchdog timer routines. Called 1385 * from softclock, we decrement timers (if set) and 1386 * call the appropriate interface routine on expiration. 1387 */ 1388 void 1389 if_slowtimo(void *arg) 1390 { 1391 struct ifnet *ifp; 1392 int s = splnet(); 1393 1394 IFNET_FOREACH(ifp) { 1395 if (ifp->if_timer == 0 || --ifp->if_timer) 1396 continue; 1397 if (ifp->if_watchdog != NULL) 1398 (*ifp->if_watchdog)(ifp); 1399 } 1400 splx(s); 1401 callout_reset(&if_slowtimo_ch, hz / IFNET_SLOWHZ, if_slowtimo, NULL); 1402 } 1403 1404 /* 1405 * Set/clear promiscuous mode on interface ifp based on the truth value 1406 * of pswitch. The calls are reference counted so that only the first 1407 * "on" request actually has an effect, as does the final "off" request. 1408 * Results are undefined if the "off" and "on" requests are not matched. 1409 */ 1410 int 1411 ifpromisc(struct ifnet *ifp, int pswitch) 1412 { 1413 int pcount, ret; 1414 short flags, nflags; 1415 1416 pcount = ifp->if_pcount; 1417 flags = ifp->if_flags; 1418 if (pswitch) { 1419 /* 1420 * Allow the device to be "placed" into promiscuous 1421 * mode even if it is not configured up. It will 1422 * consult IFF_PROMISC when it is brought up. 1423 */ 1424 if (ifp->if_pcount++ != 0) 1425 return 0; 1426 nflags = ifp->if_flags | IFF_PROMISC; 1427 if ((nflags & IFF_UP) == 0) 1428 return 0; 1429 } else { 1430 if (--ifp->if_pcount > 0) 1431 return 0; 1432 nflags = ifp->if_flags & ~IFF_PROMISC; 1433 /* 1434 * If the device is not configured up, we should not need to 1435 * turn off promiscuous mode (device should have turned it 1436 * off when interface went down; and will look at IFF_PROMISC 1437 * again next time interface comes up). 1438 */ 1439 if ((nflags & IFF_UP) == 0) 1440 return 0; 1441 } 1442 ret = if_flags_set(ifp, nflags); 1443 /* Restore interface state if not successful. */ 1444 if (ret != 0) { 1445 ifp->if_pcount = pcount; 1446 } 1447 return ret; 1448 } 1449 1450 /* 1451 * Map interface name to 1452 * interface structure pointer. 1453 */ 1454 struct ifnet * 1455 ifunit(const char *name) 1456 { 1457 struct ifnet *ifp; 1458 const char *cp = name; 1459 u_int unit = 0; 1460 u_int i; 1461 1462 /* 1463 * If the entire name is a number, treat it as an ifindex. 1464 */ 1465 for (i = 0; i < IFNAMSIZ && *cp >= '0' && *cp <= '9'; i++, cp++) { 1466 unit = unit * 10 + (*cp - '0'); 1467 } 1468 1469 /* 1470 * If the number took all of the name, then it's a valid ifindex. 1471 */ 1472 if (i == IFNAMSIZ || (cp != name && *cp == '\0')) { 1473 if (unit >= if_indexlim) 1474 return NULL; 1475 ifp = ifindex2ifnet[unit]; 1476 if (ifp == NULL || ifp->if_output == if_nulloutput) 1477 return NULL; 1478 return ifp; 1479 } 1480 1481 IFNET_FOREACH(ifp) { 1482 if (ifp->if_output == if_nulloutput) 1483 continue; 1484 if (strcmp(ifp->if_xname, name) == 0) 1485 return ifp; 1486 } 1487 return NULL; 1488 } 1489 1490 ifnet_t * 1491 if_byindex(u_int idx) 1492 { 1493 1494 return (idx < if_indexlim) ? ifindex2ifnet[idx] : NULL; 1495 } 1496 1497 /* common */ 1498 int 1499 ifioctl_common(struct ifnet *ifp, u_long cmd, void *data) 1500 { 1501 int s; 1502 struct ifreq *ifr; 1503 struct ifcapreq *ifcr; 1504 struct ifdatareq *ifdr; 1505 1506 switch (cmd) { 1507 case SIOCSIFCAP: 1508 ifcr = data; 1509 if ((ifcr->ifcr_capenable & ~ifp->if_capabilities) != 0) 1510 return EINVAL; 1511 1512 if (ifcr->ifcr_capenable == ifp->if_capenable) 1513 return 0; 1514 1515 ifp->if_capenable = ifcr->ifcr_capenable; 1516 1517 /* Pre-compute the checksum flags mask. */ 1518 ifp->if_csum_flags_tx = 0; 1519 ifp->if_csum_flags_rx = 0; 1520 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Tx) { 1521 ifp->if_csum_flags_tx |= M_CSUM_IPv4; 1522 } 1523 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Rx) { 1524 ifp->if_csum_flags_rx |= M_CSUM_IPv4; 1525 } 1526 1527 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Tx) { 1528 ifp->if_csum_flags_tx |= M_CSUM_TCPv4; 1529 } 1530 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Rx) { 1531 ifp->if_csum_flags_rx |= M_CSUM_TCPv4; 1532 } 1533 1534 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Tx) { 1535 ifp->if_csum_flags_tx |= M_CSUM_UDPv4; 1536 } 1537 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Rx) { 1538 ifp->if_csum_flags_rx |= M_CSUM_UDPv4; 1539 } 1540 1541 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Tx) { 1542 ifp->if_csum_flags_tx |= M_CSUM_TCPv6; 1543 } 1544 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Rx) { 1545 ifp->if_csum_flags_rx |= M_CSUM_TCPv6; 1546 } 1547 1548 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Tx) { 1549 ifp->if_csum_flags_tx |= M_CSUM_UDPv6; 1550 } 1551 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Rx) { 1552 ifp->if_csum_flags_rx |= M_CSUM_UDPv6; 1553 } 1554 if (ifp->if_flags & IFF_UP) 1555 return ENETRESET; 1556 return 0; 1557 case SIOCSIFFLAGS: 1558 ifr = data; 1559 if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) { 1560 s = splnet(); 1561 if_down(ifp); 1562 splx(s); 1563 } 1564 if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) { 1565 s = splnet(); 1566 if_up(ifp); 1567 splx(s); 1568 } 1569 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1570 (ifr->ifr_flags &~ IFF_CANTCHANGE); 1571 break; 1572 case SIOCGIFFLAGS: 1573 ifr = data; 1574 ifr->ifr_flags = ifp->if_flags; 1575 break; 1576 1577 case SIOCGIFMETRIC: 1578 ifr = data; 1579 ifr->ifr_metric = ifp->if_metric; 1580 break; 1581 1582 case SIOCGIFMTU: 1583 ifr = data; 1584 ifr->ifr_mtu = ifp->if_mtu; 1585 break; 1586 1587 case SIOCGIFDLT: 1588 ifr = data; 1589 ifr->ifr_dlt = ifp->if_dlt; 1590 break; 1591 1592 case SIOCGIFCAP: 1593 ifcr = data; 1594 ifcr->ifcr_capabilities = ifp->if_capabilities; 1595 ifcr->ifcr_capenable = ifp->if_capenable; 1596 break; 1597 1598 case SIOCSIFMETRIC: 1599 ifr = data; 1600 ifp->if_metric = ifr->ifr_metric; 1601 break; 1602 1603 case SIOCGIFDATA: 1604 ifdr = data; 1605 ifdr->ifdr_data = ifp->if_data; 1606 break; 1607 1608 case SIOCZIFDATA: 1609 ifdr = data; 1610 ifdr->ifdr_data = ifp->if_data; 1611 /* 1612 * Assumes that the volatile counters that can be 1613 * zero'ed are at the end of if_data. 1614 */ 1615 memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) - 1616 offsetof(struct if_data, ifi_ipackets)); 1617 break; 1618 case SIOCSIFMTU: 1619 ifr = data; 1620 if (ifp->if_mtu == ifr->ifr_mtu) 1621 break; 1622 ifp->if_mtu = ifr->ifr_mtu; 1623 /* 1624 * If the link MTU changed, do network layer specific procedure. 1625 */ 1626 #ifdef INET6 1627 nd6_setmtu(ifp); 1628 #endif 1629 return ENETRESET; 1630 default: 1631 return ENOTTY; 1632 } 1633 return 0; 1634 } 1635 1636 int 1637 ifaddrpref_ioctl(struct socket *so, u_long cmd, void *data, struct ifnet *ifp, 1638 lwp_t *l) 1639 { 1640 struct if_addrprefreq *ifap = (struct if_addrprefreq *)data; 1641 struct ifaddr *ifa; 1642 const struct sockaddr *any, *sa; 1643 union { 1644 struct sockaddr sa; 1645 struct sockaddr_storage ss; 1646 } u, v; 1647 1648 switch (cmd) { 1649 case SIOCSIFADDRPREF: 1650 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_INTERFACE, 1651 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1652 NULL) != 0) 1653 return EPERM; 1654 case SIOCGIFADDRPREF: 1655 break; 1656 default: 1657 return EOPNOTSUPP; 1658 } 1659 1660 /* sanity checks */ 1661 if (data == NULL || ifp == NULL) { 1662 panic("invalid argument to %s", __func__); 1663 /*NOTREACHED*/ 1664 } 1665 1666 /* address must be specified on ADD and DELETE */ 1667 sa = sstocsa(&ifap->ifap_addr); 1668 if (sa->sa_family != sofamily(so)) 1669 return EINVAL; 1670 if ((any = sockaddr_any(sa)) == NULL || sa->sa_len != any->sa_len) 1671 return EINVAL; 1672 1673 sockaddr_externalize(&v.sa, sizeof(v.ss), sa); 1674 1675 IFADDR_FOREACH(ifa, ifp) { 1676 if (ifa->ifa_addr->sa_family != sa->sa_family) 1677 continue; 1678 sockaddr_externalize(&u.sa, sizeof(u.ss), ifa->ifa_addr); 1679 if (sockaddr_cmp(&u.sa, &v.sa) == 0) 1680 break; 1681 } 1682 if (ifa == NULL) 1683 return EADDRNOTAVAIL; 1684 1685 switch (cmd) { 1686 case SIOCSIFADDRPREF: 1687 ifa->ifa_preference = ifap->ifap_preference; 1688 return 0; 1689 case SIOCGIFADDRPREF: 1690 /* fill in the if_laddrreq structure */ 1691 (void)sockaddr_copy(sstosa(&ifap->ifap_addr), 1692 sizeof(ifap->ifap_addr), ifa->ifa_addr); 1693 ifap->ifap_preference = ifa->ifa_preference; 1694 return 0; 1695 default: 1696 return EOPNOTSUPP; 1697 } 1698 } 1699 1700 static void 1701 ifnet_lock_enter(struct ifnet_lock *il) 1702 { 1703 uint64_t *nenter; 1704 1705 nenter = percpu_getref(il->il_nenter); 1706 (*nenter)++; 1707 percpu_putref(il->il_nenter); 1708 mutex_enter(&il->il_lock); 1709 } 1710 1711 static void 1712 ifnet_lock_exit(struct ifnet_lock *il) 1713 { 1714 il->il_nexit++; 1715 mutex_exit(&il->il_lock); 1716 } 1717 1718 /* 1719 * Interface ioctls. 1720 */ 1721 int 1722 ifioctl(struct socket *so, u_long cmd, void *data, struct lwp *l) 1723 { 1724 struct ifnet *ifp; 1725 struct ifreq *ifr; 1726 int error = 0; 1727 #if defined(COMPAT_OSOCK) || defined(COMPAT_OIFREQ) 1728 u_long ocmd = cmd; 1729 #endif 1730 short oif_flags; 1731 #ifdef COMPAT_OIFREQ 1732 struct ifreq ifrb; 1733 struct oifreq *oifr = NULL; 1734 #endif 1735 1736 switch (cmd) { 1737 #ifdef COMPAT_OIFREQ 1738 case OSIOCGIFCONF: 1739 case OOSIOCGIFCONF: 1740 return compat_ifconf(cmd, data); 1741 #endif 1742 #ifdef COMPAT_OIFDATA 1743 case OSIOCGIFDATA: 1744 case OSIOCZIFDATA: 1745 return compat_ifdatareq(l, cmd, data); 1746 #endif 1747 case SIOCGIFCONF: 1748 return ifconf(cmd, data); 1749 case SIOCINITIFADDR: 1750 return EPERM; 1751 } 1752 1753 #ifdef COMPAT_OIFREQ 1754 cmd = compat_cvtcmd(cmd); 1755 if (cmd != ocmd) { 1756 oifr = data; 1757 data = ifr = &ifrb; 1758 ifreqo2n(oifr, ifr); 1759 } else 1760 #endif 1761 ifr = data; 1762 1763 ifp = ifunit(ifr->ifr_name); 1764 1765 switch (cmd) { 1766 case SIOCIFCREATE: 1767 case SIOCIFDESTROY: 1768 if (l != NULL) { 1769 error = kauth_authorize_network(l->l_cred, 1770 KAUTH_NETWORK_INTERFACE, 1771 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 1772 (void *)cmd, NULL); 1773 if (error != 0) 1774 return error; 1775 } 1776 return (cmd == SIOCIFCREATE) ? 1777 if_clone_create(ifr->ifr_name) : 1778 if_clone_destroy(ifr->ifr_name); 1779 1780 case SIOCIFGCLONERS: 1781 return if_clone_list((struct if_clonereq *)data); 1782 } 1783 1784 if (ifp == NULL) 1785 return ENXIO; 1786 1787 switch (cmd) { 1788 case SIOCALIFADDR: 1789 case SIOCDLIFADDR: 1790 case SIOCSIFADDRPREF: 1791 case SIOCSIFFLAGS: 1792 case SIOCSIFCAP: 1793 case SIOCSIFMETRIC: 1794 case SIOCZIFDATA: 1795 case SIOCSIFMTU: 1796 case SIOCSIFPHYADDR: 1797 case SIOCDIFPHYADDR: 1798 #ifdef INET6 1799 case SIOCSIFPHYADDR_IN6: 1800 #endif 1801 case SIOCSLIFPHYADDR: 1802 case SIOCADDMULTI: 1803 case SIOCDELMULTI: 1804 case SIOCSIFMEDIA: 1805 case SIOCSDRVSPEC: 1806 case SIOCG80211: 1807 case SIOCS80211: 1808 case SIOCS80211NWID: 1809 case SIOCS80211NWKEY: 1810 case SIOCS80211POWER: 1811 case SIOCS80211BSSID: 1812 case SIOCS80211CHANNEL: 1813 case SIOCSLINKSTR: 1814 if (l != NULL) { 1815 error = kauth_authorize_network(l->l_cred, 1816 KAUTH_NETWORK_INTERFACE, 1817 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 1818 (void *)cmd, NULL); 1819 if (error != 0) 1820 return error; 1821 } 1822 } 1823 1824 oif_flags = ifp->if_flags; 1825 1826 ifnet_lock_enter(ifp->if_ioctl_lock); 1827 error = (*ifp->if_ioctl)(ifp, cmd, data); 1828 if (error != ENOTTY) 1829 ; 1830 else if (so->so_proto == NULL) 1831 error = EOPNOTSUPP; 1832 else { 1833 #ifdef COMPAT_OSOCK 1834 error = compat_ifioctl(so, ocmd, cmd, data, l); 1835 #else 1836 error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 1837 (struct mbuf *)cmd, (struct mbuf *)data, 1838 (struct mbuf *)ifp, l); 1839 #endif 1840 } 1841 1842 if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) { 1843 #ifdef INET6 1844 if ((ifp->if_flags & IFF_UP) != 0) { 1845 int s = splnet(); 1846 in6_if_up(ifp); 1847 splx(s); 1848 } 1849 #endif 1850 } 1851 #ifdef COMPAT_OIFREQ 1852 if (cmd != ocmd) 1853 ifreqn2o(oifr, ifr); 1854 #endif 1855 1856 ifnet_lock_exit(ifp->if_ioctl_lock); 1857 return error; 1858 } 1859 1860 static void 1861 ifnet_lock_sum(void *p, void *arg, struct cpu_info *ci) 1862 { 1863 uint64_t *sum = arg, *nenter = p; 1864 1865 *sum += *nenter; 1866 } 1867 1868 static uint64_t 1869 ifnet_lock_entrances(struct ifnet_lock *il) 1870 { 1871 uint64_t sum = 0; 1872 1873 percpu_foreach(il->il_nenter, ifnet_lock_sum, &sum); 1874 1875 return sum; 1876 } 1877 1878 static int 1879 ifioctl_attach(struct ifnet *ifp) 1880 { 1881 struct ifnet_lock *il; 1882 1883 if (ifp->if_ioctl == NULL) 1884 ifp->if_ioctl = ifioctl_common; 1885 1886 if ((il = kmem_zalloc(sizeof(*il), KM_SLEEP)) == NULL) 1887 return ENOMEM; 1888 1889 il->il_nenter = percpu_alloc(sizeof(uint64_t)); 1890 if (il->il_nenter == NULL) { 1891 kmem_free(il, sizeof(*il)); 1892 return ENOMEM; 1893 } 1894 1895 mutex_init(&il->il_lock, MUTEX_DEFAULT, IPL_NONE); 1896 cv_init(&il->il_emptied, ifp->if_xname); 1897 1898 ifp->if_ioctl_lock = il; 1899 1900 return 0; 1901 } 1902 1903 static void 1904 ifioctl_detach(struct ifnet *ifp) 1905 { 1906 struct ifnet_lock *il; 1907 1908 il = ifp->if_ioctl_lock; 1909 mutex_enter(&il->il_lock); 1910 ifp->if_ioctl = if_nullioctl; 1911 while (ifnet_lock_entrances(il) != il->il_nexit) 1912 cv_wait(&il->il_emptied, &il->il_lock); 1913 mutex_exit(&il->il_lock); 1914 ifp->if_ioctl_lock = NULL; 1915 kmem_free(il, sizeof(*il)); 1916 } 1917 1918 /* 1919 * Return interface configuration 1920 * of system. List may be used 1921 * in later ioctl's (above) to get 1922 * other information. 1923 * 1924 * Each record is a struct ifreq. Before the addition of 1925 * sockaddr_storage, the API rule was that sockaddr flavors that did 1926 * not fit would extend beyond the struct ifreq, with the next struct 1927 * ifreq starting sa_len beyond the struct sockaddr. Because the 1928 * union in struct ifreq includes struct sockaddr_storage, every kind 1929 * of sockaddr must fit. Thus, there are no longer any overlength 1930 * records. 1931 * 1932 * Records are added to the user buffer if they fit, and ifc_len is 1933 * adjusted to the length that was written. Thus, the user is only 1934 * assured of getting the complete list if ifc_len on return is at 1935 * least sizeof(struct ifreq) less than it was on entry. 1936 * 1937 * If the user buffer pointer is NULL, this routine copies no data and 1938 * returns the amount of space that would be needed. 1939 * 1940 * Invariants: 1941 * ifrp points to the next part of the user's buffer to be used. If 1942 * ifrp != NULL, space holds the number of bytes remaining that we may 1943 * write at ifrp. Otherwise, space holds the number of bytes that 1944 * would have been written had there been adequate space. 1945 */ 1946 /*ARGSUSED*/ 1947 int 1948 ifconf(u_long cmd, void *data) 1949 { 1950 struct ifconf *ifc = (struct ifconf *)data; 1951 struct ifnet *ifp; 1952 struct ifaddr *ifa; 1953 struct ifreq ifr, *ifrp; 1954 int space, error = 0; 1955 const int sz = (int)sizeof(struct ifreq); 1956 1957 if ((ifrp = ifc->ifc_req) == NULL) 1958 space = 0; 1959 else 1960 space = ifc->ifc_len; 1961 IFNET_FOREACH(ifp) { 1962 (void)strncpy(ifr.ifr_name, ifp->if_xname, 1963 sizeof(ifr.ifr_name)); 1964 if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') 1965 return ENAMETOOLONG; 1966 if (IFADDR_EMPTY(ifp)) { 1967 /* Interface with no addresses - send zero sockaddr. */ 1968 memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr)); 1969 if (ifrp == NULL) { 1970 space += sz; 1971 continue; 1972 } 1973 if (space >= sz) { 1974 error = copyout(&ifr, ifrp, sz); 1975 if (error != 0) 1976 return error; 1977 ifrp++; 1978 space -= sz; 1979 } 1980 } 1981 1982 IFADDR_FOREACH(ifa, ifp) { 1983 struct sockaddr *sa = ifa->ifa_addr; 1984 /* all sockaddrs must fit in sockaddr_storage */ 1985 KASSERT(sa->sa_len <= sizeof(ifr.ifr_ifru)); 1986 1987 if (ifrp == NULL) { 1988 space += sz; 1989 continue; 1990 } 1991 memcpy(&ifr.ifr_space, sa, sa->sa_len); 1992 if (space >= sz) { 1993 error = copyout(&ifr, ifrp, sz); 1994 if (error != 0) 1995 return (error); 1996 ifrp++; space -= sz; 1997 } 1998 } 1999 } 2000 if (ifrp != NULL) { 2001 KASSERT(0 <= space && space <= ifc->ifc_len); 2002 ifc->ifc_len -= space; 2003 } else { 2004 KASSERT(space >= 0); 2005 ifc->ifc_len = space; 2006 } 2007 return (0); 2008 } 2009 2010 int 2011 ifreq_setaddr(u_long cmd, struct ifreq *ifr, const struct sockaddr *sa) 2012 { 2013 uint8_t len; 2014 #ifdef COMPAT_OIFREQ 2015 struct ifreq ifrb; 2016 struct oifreq *oifr = NULL; 2017 u_long ocmd = cmd; 2018 cmd = compat_cvtcmd(cmd); 2019 if (cmd != ocmd) { 2020 oifr = (struct oifreq *)(void *)ifr; 2021 ifr = &ifrb; 2022 ifreqo2n(oifr, ifr); 2023 len = sizeof(oifr->ifr_addr); 2024 } else 2025 #endif 2026 len = sizeof(ifr->ifr_ifru.ifru_space); 2027 2028 if (len < sa->sa_len) 2029 return EFBIG; 2030 2031 memset(&ifr->ifr_addr, 0, len); 2032 sockaddr_copy(&ifr->ifr_addr, len, sa); 2033 2034 #ifdef COMPAT_OIFREQ 2035 if (cmd != ocmd) 2036 ifreqn2o(oifr, ifr); 2037 #endif 2038 return 0; 2039 } 2040 2041 /* 2042 * Queue message on interface, and start output if interface 2043 * not yet active. 2044 */ 2045 int 2046 ifq_enqueue(struct ifnet *ifp, struct mbuf *m 2047 ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr)) 2048 { 2049 int len = m->m_pkthdr.len; 2050 int mflags = m->m_flags; 2051 int s = splnet(); 2052 int error; 2053 2054 IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error); 2055 if (error != 0) 2056 goto out; 2057 ifp->if_obytes += len; 2058 if (mflags & M_MCAST) 2059 ifp->if_omcasts++; 2060 if ((ifp->if_flags & IFF_OACTIVE) == 0) 2061 (*ifp->if_start)(ifp); 2062 out: 2063 splx(s); 2064 return error; 2065 } 2066 2067 /* 2068 * Queue message on interface, possibly using a second fast queue 2069 */ 2070 int 2071 ifq_enqueue2(struct ifnet *ifp, struct ifqueue *ifq, struct mbuf *m 2072 ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr)) 2073 { 2074 int error = 0; 2075 2076 if (ifq != NULL 2077 #ifdef ALTQ 2078 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 2079 #endif 2080 ) { 2081 if (IF_QFULL(ifq)) { 2082 IF_DROP(&ifp->if_snd); 2083 m_freem(m); 2084 if (error == 0) 2085 error = ENOBUFS; 2086 } else 2087 IF_ENQUEUE(ifq, m); 2088 } else 2089 IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error); 2090 if (error != 0) { 2091 ++ifp->if_oerrors; 2092 return error; 2093 } 2094 return 0; 2095 } 2096 2097 int 2098 if_addr_init(ifnet_t *ifp, struct ifaddr *ifa, const bool src) 2099 { 2100 int rc; 2101 2102 if (ifp->if_initaddr != NULL) 2103 rc = (*ifp->if_initaddr)(ifp, ifa, src); 2104 else if (src || 2105 (rc = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, ifa)) == ENOTTY) 2106 rc = (*ifp->if_ioctl)(ifp, SIOCINITIFADDR, ifa); 2107 2108 return rc; 2109 } 2110 2111 int 2112 if_flags_set(ifnet_t *ifp, const short flags) 2113 { 2114 int rc; 2115 struct ifreq ifr; 2116 2117 if (ifp->if_setflags != NULL) 2118 rc = (*ifp->if_setflags)(ifp, flags); 2119 else { 2120 memset(&ifr, 0, sizeof(ifr)); 2121 ifr.ifr_flags = flags; 2122 rc = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, &ifr); 2123 } 2124 2125 return rc; 2126 } 2127 2128 int 2129 if_mcast_op(ifnet_t *ifp, const unsigned long cmd, const struct sockaddr *sa) 2130 { 2131 int rc; 2132 struct ifreq ifr; 2133 2134 if (ifp->if_mcastop != NULL) 2135 rc = (*ifp->if_mcastop)(ifp, cmd, sa); 2136 else { 2137 ifreq_setaddr(cmd, &ifr, sa); 2138 rc = (*ifp->if_ioctl)(ifp, cmd, &ifr); 2139 } 2140 2141 return rc; 2142 } 2143 2144 static void 2145 sysctl_sndq_setup(struct sysctllog **clog, const char *ifname, 2146 struct ifaltq *ifq) 2147 { 2148 const struct sysctlnode *cnode, *rnode; 2149 2150 if (sysctl_createv(clog, 0, NULL, &rnode, 2151 CTLFLAG_PERMANENT, 2152 CTLTYPE_NODE, "net", NULL, 2153 NULL, 0, NULL, 0, 2154 CTL_NET, CTL_EOL) != 0) 2155 goto bad; 2156 2157 if (sysctl_createv(clog, 0, &rnode, &rnode, 2158 CTLFLAG_PERMANENT, 2159 CTLTYPE_NODE, "interfaces", 2160 SYSCTL_DESCR("Per-interface controls"), 2161 NULL, 0, NULL, 0, 2162 CTL_CREATE, CTL_EOL) != 0) 2163 goto bad; 2164 2165 if (sysctl_createv(clog, 0, &rnode, &rnode, 2166 CTLFLAG_PERMANENT, 2167 CTLTYPE_NODE, ifname, 2168 SYSCTL_DESCR("Interface controls"), 2169 NULL, 0, NULL, 0, 2170 CTL_CREATE, CTL_EOL) != 0) 2171 goto bad; 2172 2173 if (sysctl_createv(clog, 0, &rnode, &rnode, 2174 CTLFLAG_PERMANENT, 2175 CTLTYPE_NODE, "sndq", 2176 SYSCTL_DESCR("Interface output queue controls"), 2177 NULL, 0, NULL, 0, 2178 CTL_CREATE, CTL_EOL) != 0) 2179 goto bad; 2180 2181 if (sysctl_createv(clog, 0, &rnode, &cnode, 2182 CTLFLAG_PERMANENT, 2183 CTLTYPE_INT, "len", 2184 SYSCTL_DESCR("Current output queue length"), 2185 NULL, 0, &ifq->ifq_len, 0, 2186 CTL_CREATE, CTL_EOL) != 0) 2187 goto bad; 2188 2189 if (sysctl_createv(clog, 0, &rnode, &cnode, 2190 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2191 CTLTYPE_INT, "maxlen", 2192 SYSCTL_DESCR("Maximum allowed output queue length"), 2193 NULL, 0, &ifq->ifq_maxlen, 0, 2194 CTL_CREATE, CTL_EOL) != 0) 2195 goto bad; 2196 2197 if (sysctl_createv(clog, 0, &rnode, &cnode, 2198 CTLFLAG_PERMANENT, 2199 CTLTYPE_INT, "drops", 2200 SYSCTL_DESCR("Packets dropped due to full output queue"), 2201 NULL, 0, &ifq->ifq_drops, 0, 2202 CTL_CREATE, CTL_EOL) != 0) 2203 goto bad; 2204 2205 return; 2206 bad: 2207 printf("%s: could not attach sysctl nodes\n", ifname); 2208 return; 2209 } 2210 2211 #if defined(INET) || defined(INET6) 2212 static void 2213 sysctl_net_ifq_setup(struct sysctllog **clog, 2214 int pf, const char *pfname, 2215 int ipn, const char *ipname, 2216 int qid, struct ifqueue *ifq) 2217 { 2218 2219 sysctl_createv(clog, 0, NULL, NULL, 2220 CTLFLAG_PERMANENT, 2221 CTLTYPE_NODE, "net", NULL, 2222 NULL, 0, NULL, 0, 2223 CTL_NET, CTL_EOL); 2224 sysctl_createv(clog, 0, NULL, NULL, 2225 CTLFLAG_PERMANENT, 2226 CTLTYPE_NODE, pfname, NULL, 2227 NULL, 0, NULL, 0, 2228 CTL_NET, pf, CTL_EOL); 2229 sysctl_createv(clog, 0, NULL, NULL, 2230 CTLFLAG_PERMANENT, 2231 CTLTYPE_NODE, ipname, NULL, 2232 NULL, 0, NULL, 0, 2233 CTL_NET, pf, ipn, CTL_EOL); 2234 sysctl_createv(clog, 0, NULL, NULL, 2235 CTLFLAG_PERMANENT, 2236 CTLTYPE_NODE, "ifq", 2237 SYSCTL_DESCR("Protocol input queue controls"), 2238 NULL, 0, NULL, 0, 2239 CTL_NET, pf, ipn, qid, CTL_EOL); 2240 2241 sysctl_createv(clog, 0, NULL, NULL, 2242 CTLFLAG_PERMANENT, 2243 CTLTYPE_INT, "len", 2244 SYSCTL_DESCR("Current input queue length"), 2245 NULL, 0, &ifq->ifq_len, 0, 2246 CTL_NET, pf, ipn, qid, IFQCTL_LEN, CTL_EOL); 2247 sysctl_createv(clog, 0, NULL, NULL, 2248 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2249 CTLTYPE_INT, "maxlen", 2250 SYSCTL_DESCR("Maximum allowed input queue length"), 2251 NULL, 0, &ifq->ifq_maxlen, 0, 2252 CTL_NET, pf, ipn, qid, IFQCTL_MAXLEN, CTL_EOL); 2253 #ifdef notyet 2254 sysctl_createv(clog, 0, NULL, NULL, 2255 CTLFLAG_PERMANENT, 2256 CTLTYPE_INT, "peak", 2257 SYSCTL_DESCR("Highest input queue length"), 2258 NULL, 0, &ifq->ifq_peak, 0, 2259 CTL_NET, pf, ipn, qid, IFQCTL_PEAK, CTL_EOL); 2260 #endif 2261 sysctl_createv(clog, 0, NULL, NULL, 2262 CTLFLAG_PERMANENT, 2263 CTLTYPE_INT, "drops", 2264 SYSCTL_DESCR("Packets dropped due to full input queue"), 2265 NULL, 0, &ifq->ifq_drops, 0, 2266 CTL_NET, pf, ipn, qid, IFQCTL_DROPS, CTL_EOL); 2267 } 2268 #endif /* INET || INET6 */ 2269
Indexes created Mon Sep 22 13:09:51 GMT 2025